Abstract
Horizontal gene transfer by natural transformation contributes to the spread of antibiotic resistance and virulence factors in bacterial species. Here, we study how one protein, SbcB, helps facilitate this process in the facultative bacterial pathogen Vibrio cholerae . SbcB is a well-known for its exonuclease activity ( i.e ., the ability to degrade the ends of linear DNA). Through this study we uncover that while SbcB is important for natural transformation, it does not facilitate this process using its exonuclease activity. Thus, this work helps further our understanding of the molecular events required for this conserved evolutionary process, and uncovers a function for SbcB beyond its canonical exonuclease activity.
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